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1.发明授权Apparatus and method for forming image with high image resolution from images having various dot densities 失效从具有各种点密度的图像形成具有高图像分辨率的图像的装置和方法公开(公告)号：US06417876B1
公开(公告)日：2002-07-09
申请号：US09590639
申请日：2000-06-08
IPC分类号： G03G1500
CPC分类号： H04N1/40037
摘要： A control unit of an image forming apparatus for controlling exposure energy includes a reference image storage unit storing a plurality of reference images, an image recognition unit comparing image information consisting of a plurality of pieces of pixel information with data stored in the reference image storage unit, an exposure energy density storage unit storing an exposure energy density for each reference image stored in the reference image storage unit, an exposure energy density determination unit based on data from the image recognition unit and data in the exposure energy density storage unit an exposure energy density to be applied to a dot position corresponding to each piece of the pixel information, and a laser drive driving a laser of an exposure unit based on data from the exposure energy density determination uni. Accordingly, the image forming apparatus can be provided which exhibits an excellent image reproducibility for images with various dot densities.
摘要翻译： 用于控制曝光能量的图像形成装置的控制单元包括存储多个参考图像的参考图像存储单元，图像识别单元将由多个像素信息组成的图像信息与存储在参考图像存储单元中的数据进行比较 曝光能量密度存储单元，其存储参考图像存储单元中存储的每个参考图像的曝光能量密度;基于来自图像识别单元的数据和曝光能量密度存储单元中的数据的曝光能量密度确定单元，曝光能量 密度被施加到与每个像素信息相对应的点位置，以及激光驱动器，其基于来自曝光能量密度确定单元的数据驱动曝光单元的激光。 因此，可以提供对于具有各种点密度的图像具有优异的图像再现性的图像形成装置。
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公开(公告)号：US06433803B1
公开(公告)日：2002-08-13
申请号：US09826199
申请日：2001-04-04
IPC分类号： B41J2385
摘要： An exposure apparatus for image formation uses power control means provided to a laser driver for controlling exposure energy and accordingly forming an image. Specifically, exposure energy is varied depending on an isolated-dot pattern and an isolated-line pattern by changing the pulse height (drive power) of a drive pulse for each dot. Both of the isolated-line and isolated-dot patterns of a high resolution can thus be reproduced with a high image quality without increase of cost due to requirements for accuracy in processing and positioning of a lens and without decrease of life of a photoreceptor due to a decreased thickness of its photosensitive layer.
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公开(公告)号：US06323888B1
公开(公告)日：2001-11-27
申请号：US09642131
申请日：2000-08-18
IPC分类号： B41J2385
CPC分类号： G03G15/326 , G03G15/04072 , H04N1/29
摘要： An image forming apparatus has the following characteristics: the diameter of an exposure beam for exposing a latent image is not more than twice a minimum dot recording period p in peak intensity 1/e2, and the value of a spatial frequency characteristic function of a latent image defined by the thickness of a photoreceptor layer, the dielectric constant of the photoreceptor layer, the thickness of a developer layer, the dielectric constant of the developer layer and a spatial frequency &ohgr; defined as &ohgr;=&pgr;/p is at least 0.3. The image forming apparatus having such characteristics can reproduce an image of high resolution exceeding 600 to 1200 DPI with high fidelity.
摘要翻译： 图像形成装置具有以下特征：用于曝光潜像的曝光光束的直径不大于峰值强度1 / e2的最小点记录周期p的两倍，并且潜在的空间频率特征函数的值 由感光体层的厚度，感光体层的介电常数，显影剂层的厚度，显影剂层的介电常数和定义为Ω= pi / p的空间频率Ω定义的图像为至少0.3。 具有这种特征的图像形成装置可以以高保真度再现超过600至1200DPI的高分辨率图像。
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公开(公告)号：US06298206B1
公开(公告)日：2001-10-02
申请号：US09506304
申请日：2000-02-17
IPC分类号： G03G1508
CPC分类号： G03G15/344 , G03G15/0806 , G03G15/0812 , G03G2215/0614 , G03G2215/0634
摘要： It is an object of the invention that development quality is improved by increasing the amount of charge during the transportation of toner by a toner holding member and decreasing the amount of charge during development for rendering an electrostatic latent image visible. A one-component non-magnetic toner is supplied from a toner supplying unit to the toner holding member such that the toner is electrostatically attracted to adhere to the toner holding member with a large amount of charge. The charge of the toner under transportation is reduced by charge adjusting means such as a conductive roller supplied with a potential from a frictional charging member or a voltage source, whereby the amount of development or the amount of toner adhering to an electrostatic latent image is increased and development quality is improved.
摘要翻译： 本发明的一个目的是通过在调色剂保持部件输送调色剂期间增加电荷量并减少显影期间的电荷量，使静电潜像变得可见，从而提高显影质量。 单色非磁性调色剂从调色剂供应单元供应到调色剂保持构件，使得调色剂被静电吸引以以大量的电荷附着到调色剂保持构件。 运输中的调色剂的电荷通过诸如由摩擦充电部件或电压源提供电位的导电辊等电荷调节装置而减少，由此显影量或与静电潜像粘附的调色剂量增加 开发质量提高。
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公开(公告)号：US06714225B2
公开(公告)日：2004-03-30
申请号：US10213427
申请日：2002-08-06
IPC分类号： B04J2385
CPC分类号： H04N1/4055
摘要： When a halftone image region that is below a predetermined density is to be reproduced, a processing unit controlling an exposure unit selects an exposure pattern that can represent a record dot diameter within a range based on a predetermined rule from exposure patterns prepared in advance. Accordingly, graininess is suppressed. When there are a plurality of exposure patterns that can be applied, the exposure pattern with the lowest number of dots present per 1 inch is employed. Accordingly, a halftone image is formed with the image reproducibility improved.
摘要翻译： 当要再现低于预定浓度的半色调图像区域时，控制曝光单元的处理单元基于预先规定的曝光图案，基于预定规则从一个范围内选择可以表示记录点直径的曝光图案。 因此，抑制了颗粒性。 当存在可以应用的多个曝光图案时，采用每1英寸存在最少点数的曝光图案。 因此，形成具有提高图像再现性的半色调图像。
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6.发明授权Apparatus and method for forming image with superior image reproducibility 有权用于形成具有优异图像再现性的图像的装置和方法公开(公告)号：US06239824B1
公开(公告)日：2001-05-29
申请号：US09591607
申请日：2000-06-09
IPC分类号： G03G1504
CPC分类号： H04N1/40037
摘要： An exposure energy control unit of an image forming apparatus controls exposure energy density Edot (&mgr;J/cm2) to be applied to an isolated one-dot pattern of image information to satisfy a relation −0.11P+6.4≦Edot/Eline≦−0.2P+10.7 where Eline (&mgr;J/cm2) represents exposure energy density applied to a line pattern of the image information having lines on every second lines and P (&mgr;m) represents dot pitch. Accordingly, image reproducibility of both of a periodic line pattern and an isolated dot pattern can be enhanced without decreasing the film thickness of a photoreceptor even if the resolution is high.
摘要翻译： 图像形成装置的曝光能量控制单元控制曝光能量密度Edot（μJ/ cm 2），以应用于孤立的单点图案的图像信息，以满足其中Eline（μJ/ cm 2）表示施加到 在第二行上具有线的图像信息的线图案和P（母）表示点间距。 因此，即使分辨率高，也可以在不降低感光体的膜厚的情况下增强周期性线图案和孤立点图案的图像再现性。
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公开(公告)号：US06496210B2
公开(公告)日：2002-12-17
申请号：US09977030
申请日：2001-10-15
IPC分类号： G03G1500
CPC分类号： H04N1/29
摘要： In a digital electrophotographic imaging process in which a latent electrostatic image is written to a charged photoreceptor using an exposure beam diameter Ds larger than pixel pitch Dp and the image is visualized by development, an unsaturated region of photo-induced discharge characteristics of the photoreceptor is used for an image portion of isolated 1 line, and a saturated region of the photo-induced discharge characteristics of the photoreceptor or gamma characteristics of development is used for an image portion for n lines (n≧2).
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公开(公告)号：US20070206270A1
公开(公告)日：2007-09-06
申请号：US10586808
申请日：2004-01-21
IPC分类号： G02F1/167
CPC分类号： G09G3/344 , G02B26/004 , G02F1/133514 , G02F1/167 , G02F2001/1672 , G02F2001/1678 , G09F9/372
摘要： A large number of holes are formed in a two-layered porous film sandwiched between a lower substrate and an upper substrate and filled with a light transmitting liquid and fine particles. When a voltage is applied between an upper electrode and a lower electrode, migration of the fine particles, takes place based on electrophoresis. White color is displayed when the fine particles are located on an upper transparent porous film side and black color is displayed when the fine particles are located on a lower black porous film side. Color display is also possible by periodically repeating three primary colors of RGB in the lower layer porous film or arranging a color filter on the transparent upper substrate. Bubbles-containing fine particles or bubbles themselves may be employed in place of the fine particles.
摘要翻译： 夹在下基板和上基板之间的两层多孔膜中形成大量的孔，并且填充有透光液体和细颗粒。 当在上电极和下电极之间施加电压时，基于电泳发生微粒的迁移。 当细颗粒位于上透明多孔膜侧时显示白色，并且当微粒位于下黑色多孔膜侧时显示黑色。 通过在下层多孔膜中周期性地重复RGB三原色或在透明上基板上排列滤色器，也可以进行彩色显示。 可以使用含气泡的微粒或气泡本身代替细颗粒。
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公开(公告)号：US07477442B2
公开(公告)日：2009-01-13
申请号：US10586808
申请日：2004-01-21
CPC分类号： G09G3/344 , G02B26/004 , G02F1/133514 , G02F1/167 , G02F2001/1672 , G02F2001/1678 , G09F9/372
摘要： A large number of holes are formed in a two-layered porous film sandwiched between a lower substrate and an upper substrate and filled with a light transmitting liquid and fine particles. When a voltage is applied between an upper electrode and a lower electrode, migration of the fine particles, takes place based on electrophoresis. White color is displayed when the fine particles are located on an upper transparent porous film side and black color is displayed when the fine particles are located on a lower black porous film side. Color display is also possible by periodically repeating three primary colors of RGB in the lower layer porous film or arranging a color filter on the transparent upper substrate. Bubbles-containing fine particles or bubbles themselves may be employed in place of the fine particles.
摘要翻译： 夹在下基板和上基板之间的两层多孔膜中形成大量的孔，并且填充有透光液体和细颗粒。 当在上电极和下电极之间施加电压时，基于电泳发生微粒的迁移。 当细颗粒位于上透明多孔膜侧时显示白色，并且当微粒位于下黑色多孔膜侧时显示黑色。 通过在下层多孔膜中周期性地重复RGB三原色或在透明上基板上排列滤色器，也可以进行彩色显示。 可以使用含气泡的微粒或气泡本身代替细颗粒。
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